What are the products formed when $Li_2CO_3$ undergoes thermal decomposition?

Which metal forms amide with $NH_3$ at $300\ ^oC$?

$A$ substance $X$ is a compound of an element of group $IA$. The substance $X$ gives a violet colour in flame test. $X$ is

Sodium peroxide is used to purify the air in submarines and confined spaces because

Which metal does not react with cold water but evolves $H_2$ gas when reacted with steam?

$A$ metal on combustion in excess air forms $X$. $X$ upon hydrolysis with water yields $H_2O_2$ and $O_2$ along with another product. The metal is